waterhouse



(No Model.)

A. WATERHOUSE. CARBON HOLDER FOR ELBGTRIG LAMPSI' Patented Jan. 17,1882.

' \X/iitnessesf Inventor;

J-l-.% l c v @MQMWQ l U m r N. PETERS. Pbokrb'lhngnphnl: Washington. D. C.

, UNITED STATES NT OFFER? ADDISON G.,WATERHOUSE, OF NEW YORK, N. Y., ASSIGNOR TO THE UNITED STATES ELECTRIC LIGHTING COMPANY, OF SAME PLACE.

.CARB O N-HO LDER FOR ELECTRIC LAMPS.

SFECIFICATION forming part of Letters Patent No. 252,404, dated January 17, 1882.

Application filed April 30,1881. (No modeLl' To all whom it may concern:

Be it known that I, Annrson G. WATER HOUSE, a citizen of the United States, residing in New York, in the county of New Yo: k

andState otNew York, have invented certain new and useful Improvements in Carbon-Holders for Electric Lamps,pf whichthe'following isja specification. I,

My invention relates to thedevices employed in electric-arc lamps for holding the carbons in position, and its objects are, mainly, to so construct these holders that they shall be easily detached from the lamp-frame, readily adjusted for the various angles or verticallines in which it is necessary to place the carbon pencils, and-shall secure a perfect electrical contact between the metal of the lamp and the pencil. These ends I attain by the devices illustrated in the accompanying drawings, in which- Figure 1 is a viewof the upper holder; Fig.

2, a part sectional view of the lower holder, showing the same attached to the lower cross piece of a lamp;Fig. 3, a plan view of the upper part of the .holder; Fig. 4,,a view of 'the clam ping devices detached, and Fig. 5 a modification of the same.

per ends will inolose the ball B and their'lower portions tightly embrace the end of a carbon. By this means the carbon isfirmly clamped and rigidly'secured to the carrier, while by loosening slightlythe screw S the carbon may be turned or adjusted to any angle within reasonable limits, which is often necessary in order to bring the points of the two carbons together. The principal advantages of-this construction are that the clamps may be castat slight expense, and while securing all the advantages of the ordinary balland-socket joints they possess the additional recommendation of making with the end of the carbon pencil a perfect electrical contact-a thing which, with the greater portion ofthe holders as heretofore made, is attained only with great difficulty.

The lower carbon-holder (illustrated in the remaining figures) is composed ofthe two'part-s e andf, which are drawn together and clamped to the cross-bar B of the lamp-frame by the screw h and nut a. The main portion consists ofa semi-cylindrical socket, f, provided with two legs, l l,,and terminating in the screw 12. The other portion is composed of a semi-cylindrical body, 6, from which projects a leg, I, and a notched arm, g, adapted to hook under pins a, suitably situated on the sides of the socketf, as shown in Fig. 2.

The portion of the cross-bar to which the holder is clamped is eitherconcave or convex, as shown at m, Figs. 5 and 2, in order to at-- ford greater facility in shifting the position of the holder when it becomes necessary to adjust the carbons or to set them at different an gles.

When the two portions ofthe holder 6 and f are caused to engage the end of a carbon inserted between them and the nut n tightened, the pins 0 depress the notched arms g, causing the upper portion, e, to bind the carbon pencil inthe socket andclamping both parts of the holder firmly down to the cross-bar B of the frame.

The holder is easily taken apart when it is necessary to clean it, and, from the facility with which it is adjusted and the perfect contact it What I desire to secure by Letters Patent is-- 1. Thecom-bination, with the carbon-sup.

porting rod A, of a carbon holder or socket consisting of the two clamping-sections (l and b and screw S, the said sections being formed with a socket at one end adapted to lit the I spherical end of the rod A and grooves at the other for clamping the end of the carbon as described.

IOO

2. The combination, in a carbon-holder, of the semi cylindrical socket c and clampingsection f, hinged together by the arms 9 and pins 0, and clamped to the cross-bar B by 'means of nut n and screw h passing through the bar, as described.

3. The combination, in an electric lamp, of a carbon-holder, with a cross-bar having a convex or concave seat on which the holder is clamped by means of a nut and screw, whereby the holder is capable of both lateral and angular adjustment, as described.

4. The combination of the semi cylindrical socketf, having legs Z Z, with clamping-piece a part of thesocketf, substantially as shown 20 I and described.

In testimony whereof I have hereunto set my hand.

ADDISON e, .WATERHOUSE.

Witnesses:

J OHN TREGONING, W. H. CALHOUN, Jr. 

